dgraham/delegated-events
Delegated Events
Delegated-events is a JavaScript library designed for managing DOM interactions and component communication through centralized event handling. It provides utilities to implement event delegation, allowing developers to register a single listener on a parent element that triggers only when events originate from child elements matching specific CSS selectors.
The library distinguishes itself by integrating type-safe payload validation, which ensures that data exchanged between application components adheres to predefined structures. By consolidating multiple potential handlers into a single shared parent registration, the library reduces the total number of active event listeners and optimizes memory usage.
Beyond delegation, the project includes a system for dispatching custom events to facilitate decoupled communication between independent parts of an application. These tools standardize how web applications process user interactions and data, supporting consistent event management across complex interfaces.
Features
- Event Delegation - Enables efficient event delegation by registering a single handler on a parent element that triggers only when events originate from children matching specific CSS selectors.
- Event Payload Type Narrowing - Provides type-safe event payload validation, mapping custom event names to specific data structures to ensure data consistency and error-free development.
- Custom Event Dispatchers - Facilitates communication between components by dispatching custom events with associated data payloads for decoupled interaction.
- Event Bubbling Mechanisms - Relies on the standard browser event propagation phase to capture interactions at a parent node for centralized event management.
- DOM & Event Handling - Provides a mechanism for handling events across multiple child elements from a common ancestor to reduce memory usage and simplify logic.
- Event Listener Management - Reduces the total number of active event listeners by consolidating multiple potential handlers into a single shared parent registration.
